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Posted to issues@flink.apache.org by "Jark Wu (JIRA)" <ji...@apache.org> on 2019/04/16 02:54:00 UTC
[jira] [Closed] (FLINK-12017) Introduce Rank and Deduplicate
operators for blink streaming runtime
[ https://issues.apache.org/jira/browse/FLINK-12017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jark Wu closed FLINK-12017.
---------------------------
> Introduce Rank and Deduplicate operators for blink streaming runtime
> ----------------------------------------------------------------------
>
> Key: FLINK-12017
> URL: https://issues.apache.org/jira/browse/FLINK-12017
> Project: Flink
> Issue Type: Task
> Components: Table SQL / Planner
> Reporter: Jing Zhang
> Assignee: Jing Zhang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Support translation from Rank/Deduplicate to StreamTransformation, So following sql can be run:
> 1.
> SELECT a, b, c
> FROM (
> SELECT *,
> ROW_NUMBER() OVER (PARTITION BY b ORDER BY proc DESC) as rowNum
> FROM T
> )
> WHERE rowNum = 1
> 2.
> SELECT *
> FROM (
> SELECT category, shopId, num,
> ROW_NUMBER() OVER (PARTITION BY category ORDER BY num DESC) as rank_num
> FROM T)
> WHERE rank_num <= 2
>
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